Barrel-forming die.



L. BAUROTH.

BARREL FORMING DIE.

APPLICATION FILED 001.228.1910.

- Patented Aug. 15,1911.

3 SHBETSSHEET l.

L. BAUROTH.

' BARREL FORMING DIE.

APPLICATION FILED 0012s. 1910.

Patented Aug. 15, 1911.

3 SHEETS-SHEET 2.

L. BAUROTH.

'BARREL FORMING DIE. APPLICATION rung) 0013.28.1910.

Patented Aug. 15, 1911.

3 SHEETS-SHEET 3.

UNITED s'rATEs PATENT OFFICE.

mom]: BAUBOTH, or round 01110, AssIG'NoR r0 CHARLES H. WAGKEB. or" CHICAGO, rumors.

BARREL-FORMING DIE.

Application filed October 28, 1910. Serial No. 589,515.

Toledo, in the county of Lucas and State of Ohio, have invented certain new and use-- ful Improvements in Barrel-Forming Dies, of which the following is a specification.

My invention relates to the art of fo rming metallic barrels in which the entire bilge section from head to head is formed from a single blank of seamless tubing and the particular object of my invention is to construct a machine in which the cylindrical blanks from which the bilge sections are formed are expanded at their central portions to give the barrel its ultimate shape. In the present invention the shaping is accomplished pneumatically, the tubular blank being placed in a die of suitable shape, sealed at its ends, and subjected to high internal pressure whereby it is made'to conform to the interior of the die. In the accompanying drawings in which my invention is illustrated Figure 1 is a vertical longitudinal section through the center of my barrel-forming machine; Fig. 2 is a plan view thereof; Fig. 3 an end view; and Fig. 4 a section on the line 44 of Fig. 2.

The same numerals of reference are used to refer to identical parts in the several views.

The body of the machine consists of a main casting 1, the central part of which is shaped t conform internally to the shape which it is desired to give the barrel bodies and the ends of which are cylindrical for a purpose which will appear. The legs or supports 2 may be formed integral with or attached to the body, though in the present instance I have shown them as cast therewith. The intermediate section of the body.

casting is divided horizontally longitudinally as shown in Fig. 4, the upper half 3 being hinged to the lower half 4 at 5 whereby the die may be opened for the insertion of the barrel blank. At either end of the body casing provision is made for sealing the end of the barrel blank previous to the application of internal pressure. For this purpose the ends are made cylindrical as at 6 and within the cylindrical bores are arranged packing heads 7 formed with rabbets 8 within which are seated packing 9 to bear against the ends of the cylindrical blank.

against leakage. In the preferred form shown the heads are actuated by pneumatic,

pressure, this being convenient since it does not require an additional source of power. For this purpose the outer ends of the easmg are closed by heads 11 which are bolted as shown to the casing andprovided with lnwardly-extending central bosses 12 which .form stops for the packing heads. The latter are also provided with bosses 13 which extend outwardly and are adapted when the packmg heads are in their outer position to abut against the previously-mentioned bosses 12- to limit the outward movement. The cylindrical ends of the casing are bored in two diameters, the inner of which has already been referred to as constituting a bearing for the packing heads and the outer of which is larger and constitutes an actuating cylinder for the packing heads and the latter areprovided with annular enlargements 14 which are packed at 15 and constitute pistons within the enlarged bores. One of the piston cylinders shown in Fig. 2 at the left is furnished at its opposite ends with conduits 16 and 17 which may be connected by suit-able hand-controlled valves 1.8 and 19 at pleasure with either the atmosphere or with the source of compressed air in'case that be the fluid employed. The inner ends of the piston cylinders are connected together by a pipe 20 and the outer ends are likewise connected by a pipe 21 so that pressure admitted to the cylinder atthe left of the figures is immediately communicated also to the cylinder at the right of the figure and likewise when the lefthand cylinder is exhausted the right-hand cylinder assumes a like condition, it being obviously desirable that the packingheads shall move together in either direction. The upper pivoted half 3 of the die must be provided with meansfor locking itin closed position. For this purpose I form it at its opening edge with projecting lugs22, 23, which are arranged to co-act with a locking device pivoted upon lugs 24 formed upon the lower section. The last-named device includes a pair of links 25 pivoted at 26 to the lugs 24 and connected at their upper ends by a shaft 27, the ends of which are journaled as at 28 in the free ends of the links. The body ofthe shaft is eccentric to the journals as indicated in Fig. 4.

Specification of Letterslatent. Pat nted 15, 19 11 Additional packings 10 seal the heads and is provided at its ends with crank arms 29 and handles 30. When the die is closed the links may be swung upward to bring the shaft 27 above the lugs 22 and by means of th s handles the shaft may be rotated to bear upon the lugs '22 which are provided with wear plates 31 to receive the locking shaft. A handle 33 is pivoted to the cover section of the die for convenience in opening and closing it and if desired a strap 34 may be connected thereto where power means is employed for the purpose. The fluid, under ressure for expanding the bar rel blanks is supplied through a pipe 35 which extends within a chamber 36 within the boss of the casing head at the left of Fig. .1 in which it is packed to prevent leakage. The boss 13 of the corresponding packing head 7 is perforated to receive a pipe 8 which projects outwardly therefrom and into the chamber 36 of the casing head where it is packed by a sleeve 37 but permitted longitudinal motion. Thus no matter what the position of the packing head the source of compressed air is always in communication with the interior of the die subject to the control of a hand valve 38 (see particularly Figs. 2 and 3).

The operating levers of valves 18 and 38 are connected together by a link 39 (see Fig. 2) for simultaneous operation but the link is slotted at one end as at 40 to provide lost motion between the valves whereby when the handle 41 connected to the valve 18 is turned the latter is opened prior to the movement of valve 38. The object of this construction is to secure the sealing of the barrel blank before pressure is admitted to its interior. Around the center of the die at suitable intervals'are formed openings 42 to permit the escape of any air trapped between the exterior of the blank A and the -been accomplished the communication between the source of compressed air and the outer ends of the piston cylinders is out ofl followed by a closure of communication to the interior of the blank and finally by opening communication between the outer ends of the piston cylinders and the atmosphere. Compressed air may then be admitted to the inner ends of the piston cylinders through the valve 19 whereupon the packing heads will be withdrawn from contact with the barrel blank. The die may then be opened and the formed blank removed.

Numerous changes may be made in the apparatus described without removing it beyond the limits of my invention which is die, and means for feeding a fluid under pressnre'to the interior of the blank.

2. Ina barrel-forming machine, a hollow die adapted -to receive a blank, packing heads for sealing the ends of the blank movable in and with relation to the die, and means for moving'the heads into operative position, and means for supplying the interior of the blank with fluid under pressure.

3. In a barrel-forming machine, a casing having the intermediate portion of its interior shaped to conform to the article to be produced, cylindrical end portions adjacent the intermediate section, packing heads arranged to slide in the cylindrical end portions, means for moving the heads into contact with the ends of the blank within the casing, and means for supplying fluid under pressure to the interior of the blank.

{1. In a barrel-forming machine, a casing having the intermediate portion of its interior shaped to conform to the article to be produced, closed cylindrical end portions, packing heads arranged to slide in the cylindrical portions, means for introducing fluid under pressure to the ends of the casing to actuate the heads, and means for supplying fluid under pressure to the interior of the blank.

5. In a barrel-forming machine, a casing, the intermediate portion of whose interior is shaped to conform to the article to be produced, cylindrical sections adjacent either end of the intermediate section, cylindrical sections of increased diameter adjacent the last-named cylindrical sections,

to conform to the article to be produced, cylindrical sections adjacent the intermediate section, packing heads arranged to slide within the cylindrical sections, actuating cylinders beyond the said cylindrical sections, enlargements upon the packing heads inders, and means for introducing fluid to the interior of the barrel blank.

7. In a machine for forming barrels, a casing, the intermediate section of which is shaped to conform to the article to be r0- duced, cylindrical sections at the endsp the intermediate section, packing heads within the cylindrical .sections,-means for actuating the,packing heads to seal the blank ends, a chamber within the end of the casing, a supply pipe communicating with such chamber, and a pipe movable with the head and telescoping within the chamber.

8. In a machine for forming barrels, a casing, the intermediate portion of which conforms to the shape of the article to be produced, cylindrical 'sections atopposite ends of the intermediate section, packing heads sliding within the cylindrical sections, means for supplying the interior of the blank with fluid under pressure, valves for controlling the supply of fluid to the interior of the blank and'to the head, operating means, a 10st motion connection between the valve-operating means whereby the packing-heads may be operated and fluid supplied to the interior of the blank in the order named.

LEoNinmD BAUROTH.

' Witnesses:

Roenu'r YOUNG, CHARLES HARTMAnN. 

